hey i got a bmx bike and ill like to use it but i never have time. when i get out of school i go straight to work. then whe i come back i do my homework. then i play some xbox so i never got time. but i want to know what that thing called that makes your bike still. you can pedall as much as u want but doesnt move. i seen it on the movie 'you me and dupree'. he was pedalling and competing with a person that was fake in a game.